Within the framework of generalized Lorenz–Mie theory, scattering from a homogeneous spheroidal particle illuminated by an on-axis zero-order Bessel beam is formulated analytically, with special attention paid to the investigation of internal and near-surface fields. Numerical results concerning the spatial distributions of internal and near-surface fields are presented for various parameter values, such as the half-cone angle of the incident zero-order Bessel beam, the major axis, the minor axis, and the refractive index of the spheroid. The study of internal and near-surface field distributions will contribute to the understanding of Bessel beam scattering by nonspherical particles with sizes close to the incident wavelength.
© 2014 Optical Society of America
Original Manuscript: June 13, 2014
Revised Manuscript: July 14, 2014
Manuscript Accepted: July 14, 2014
Published: August 8, 2014
Vol. 9, Iss. 11 Virtual Journal for Biomedical Optics
Lu Han, Yiping Han, Jiajie Wang, and Zhiwei Cui, "Internal and near-surface electromagnetic fields for a dielectric spheroid illuminated by a zero-order Bessel beam," J. Opt. Soc. Am. A 31, 1946-1955 (2014)